About 28.3 hours. A 500 Wh power station has roughly 425 Wh usable, and a Wi-Fi router and modem averages about 15 W. Depending on the model the range is about 12.1 to 70.8 hours.
- Runtime
- 28.3 hEstimate at average draw
- Usable energy
- 425 Wh85% of 500 Wh
- Average draw
- 15 W15 W while running
- Surge
- NoneNo motor start
The math
| Usable capacity | 500 Wh × 0.85 = 425 Wh |
|---|---|
| Average draw | 15 W running × 1 duty = 15 W |
| Runtime | 425 ÷ 15 = 28.3 h |
Other battery sizes
Questions people ask
How long will a 500 Wh power station run a Wi-Fi router and modem?
About 28.3 hours (about 28.3 hours). A 500 Wh power station has roughly 425 Wh usable, and a Wi-Fi router and modem averages about 15 W. Depending on the model the range is about 12.1 to 70.8 hours.
How many watts does a Wi-Fi router and modem use?
A home Wi-Fi router uses about 4-10 watts and a modem or fiber ONT a similar amount, so the pair typically draws about 10-20 watts combined. Large Wi-Fi 7 or gateway units can use 20-25 W each.
How do you calculate power station runtime?
Hours ≈ capacity in Wh × 0.85 ÷ average watts. The 0.85 allows for inverter and battery losses.